摘要
针对盾构隧道的施工阶段、注浆材料及管片接头的特性提出了有限元模拟方法。在有限元分析中考虑了盾构衬砌接头的转动效应和盾尾部位注浆材料在施工中由液态向固态转化的凝固过程，并采用作者提出的梁-接头不连续模型与注浆材料的变刚度等效法来模拟其力学变化。将建立的施工模拟有限元软件应用于大阪地铁7号线盾构隧道施工的力学分析中，并对在均市和非均布注浆压力下，土压力及衬砌内力的计算值与实测值作了比较分析，发现非均布条件下的计算值较均布条件下的计算值接近于实测值。
The different FEM simulating techniques are put forward according to the characteristics of the staged construction, thegrouting material and the segment joint of shield tunnel. The rotational effect of the shield lining joint and the setting processof grouting material at shield tail point from liquid state to solid state are taken into consideration in the finite element analy-ses. The mechanical behavior of the segment lining is simulated by use of the author's beam-joint model and the equivalentmethod of variable stiffness of grouting material related with each construction stage. The FEM for construction simulating withthe stress releasing concept is applied to the analysis of the shield tunneling in Osaka's No. 7 Subway line, and the calculat-ed results of the normal pressure on lining and the intrnal foree of segment are compared with the measured data for the uni-form and non-uniform grouting pressures. It is found that the calculated data under the non-uniform condition are more closerto the measutal ones than those under the uniform condition.
出处
《土木工程学报》
EI
CSCD
北大核心
2000年第3期98-103,共6页
China Civil Engineering Journal
关键词
盾构隧道
有限元施工模拟
应力释放系数
shield tunnel, FEM simulation for staged construction, stress releasing coefficient, field monitoring measurement
